Millwright-Preventive and Predictive Maintenance Study Guide 2023
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Course
Millwright
Institution
Millwright
Millwright-Preventive and Predictive Maintenance Study Guide 2023
Preventive maintenance
is the periodic inspection and maintenance of plant assets and equipment to uncover conditions that may to equipment failure or shortened life
This measures the amount of contaminants per litre of fluid.
...
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Millwright-Preventive and Predictive Maintenance Study
Guide 2023
Preventive maintenance
is the periodic inspection and maintenance of plant assets and equipment to uncover
conditions that may to equipment failure or shortened life
This measures the amount of contaminants per litre of fluid.
a. ferromagnetic analysis
b. total base number
c. infrared tests
d. gravimetric level analysis
d. gravimetric level analysis
These tests indicate how much of the oil additives have been depleted
a. ferromagnetic analysis
b. total base number
c. spectographic level analysis
d. gravimetric level analysis
b. total base number
This technique is advanced and becomming more common in industry. It
determines concentrations of contaminants over a period and accurately predicts
the lubricant failure.
a. ferromagnetic analysis
b. total base number
c. spectographic level analysis
d. gravimetric level analysis
c. spectographic level analysis
These tests reveal the amount of general oil degradation.
a. ferromagnetic analysis
b. infrared
c. spectographic level analysis
d. gravimetric level analysis
b. infrared
What is a method of determining the condition of lubrication or hydraulic oil?
Particle Analysis
Automatic particle counters APCs or laser particle sizing APS can determine particle
size and distribution
What is one of the most expensive and dangerous methods of NDT?
Using X-Rays
Harmful gamma and xrays
What two kinds of Ultra-Sonic inspection are used in Millwright trade?
Immersion and Contact
Scale, paint and corrosion removal may be required before inpsection
, Static unbalance is sometimes called (this is when the weighted centerline and
shaft axis are parallel but misaligned (shifted) along their length
a. force or kinematic unbalance
b. couple unbalance
c. misalignment
d. shaft offset
a. force or kinematic unbalance
This is caused when shafts weight is evenly distributed along its length but unevenly
distributed side to side
This type of unbalance has extra equal weights on opposite sides of the shaft. (6
oclock and 12 oclock) This causes the weighted centerline of the rotating part to
intersect the shaft axis.
a. force or kinematic unbalance
b. couple unbalance
c. quasi static
d. shaft offset
b. couple unbalance
detailed analysis
All good PM programs begin with a ________ of past equipment failures, including their
costs, causes, remedial actions taken, and changing demands on the equipment.
critical, important, and nonthreatening
Three catagories of equipment failures:
Nondestructive testing
NDT
Nondestructive evaluation
NDE
How is couple unbalance detected?
a. when shaft is rotated and 180* phase angle is indicated between ends of arbor
b. when shaft is rotated and 180* phase angle is indicated between ends of rotor
c. when shaft is rotated and 270* phase angle is indicated between ends of rotor
d. when shaft is rotated and 270* phase angle is indicated between ends of arbor
b. when shaft is rotated and 180* phase angle is indicated between ends of rotor
PDM program
NDE is the main tool in the _______.
In this condition the extra weights at either end are unequal and are at opposite
ends of the shaft
a. force or kinematic unbalance
b. couple unbalance
c. quasi static
d. dynamic unbalance
c. quasi static
The weighted centerline of the rotor and shaft axis do not intersect in the centerline of
the shaft
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